The Philippines has swept about 20,000 homeless from the streets, cancelled more than 1000 flights, deployed 18,000 police and declared public holidays in Manila to ensure a safe and efficient summit, the organisers have said.
Major streets in the usually chaotic capital are being closed to traffic to speed up the shuttling of delegates and police have asked building owners to close their windows to prevent their use by snipers.
Yesterday Philippine marines deployed anti-aircraft guns around the main summit venue as police conducted a full rehearsal of the visiting leaders' motorcades to the summit venues and their hotels.
Military helicopters flew low overhead and naval gunboats patrolled the waters of nearby Manila Bay.
The Philippines has a long history of Islamic militancy in a southern region about 1000km from Manila, although extremists have also carried out deadly attacks in the capital.
Apec has 21 member-economies, but Russian President Vladimir Putin is skipping the meeting, as is Indonesia's President Joko Widodo.